package cc.mrbird.common.aspect;

import java.lang.reflect.Method;
import java.util.List;

import org.aspectj.lang.JoinPoint;
import org.aspectj.lang.Signature;
import org.aspectj.lang.annotation.Aspect;
import org.aspectj.lang.annotation.Before;
import org.aspectj.lang.annotation.Pointcut;
import org.aspectj.lang.reflect.MethodSignature;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import cc.mrbird.common.aspect.lang.annotation.DataScope;
import cc.mrbird.common.controller.BaseController;
import cc.mrbird.common.domain.BaseEntity;
import cc.mrbird.common.util.StringUtils;
import cc.mrbird.system.domain.Role;
import cc.mrbird.system.domain.User;
import cc.mrbird.system.service.RoleService;

/**
 * 数据过滤处理
 * 
 * @author ruoyi
 */
@Aspect
@Component
public class DataScopeAspect extends BaseController
{
	@Autowired 
	public RoleService roleService;
    /**
     * 全部数据权限
     */
    public static final String DATA_SCOPE_ALL = "1";

    /**
     * 自定数据权限
     */
    public static final String DATA_SCOPE_CUSTOM = "2";

    /**
     * 部门数据权限
     */
    public static final String DATA_SCOPE_DEPT = "3";

    /**
     * 部门及以下数据权限
     */
    public static final String DATA_SCOPE_DEPT_AND_CHILD = "4";

    /**
     * 数据权限过滤关键字
     */
    public static final String DATA_SCOPE = "dataScope";

    // 配置织入点
    @Pointcut("@annotation(cc.mrbird.common.aspect.lang.annotation.DataScope)")
    public void dataScopePointCut()
    {
    }

    @Before("dataScopePointCut()")
    public void doBefore(JoinPoint point) throws Throwable
    {
        handleDataScope(point);
    }

    protected void handleDataScope(final JoinPoint joinPoint)
    {
        // 获得注解
        DataScope controllerDataScope = getAnnotationLog(joinPoint);
        if (controllerDataScope == null)
        {
            return;
        }
        // 获取当前的用户
        User currentUser = getCurrentUser();
        if (currentUser != null)
        {
            // 如果是超级管理员，则不过滤数据
/*            if (!currentUser.isAdmin())
            {*/
                //获取所有的角色信息
                List<Role> roles=roleService.findUserRole(currentUser.getUsername());
                dataScopeFilter(joinPoint, currentUser, controllerDataScope.tableAlias(),roles);
            /*}*/
        }
    }

    /**
     * 数据范围过滤
     * 
     * @param joinPoint 切点
     * @param user 用户
     * @param alias 别名
     */
    public static void dataScopeFilter(JoinPoint joinPoint, User user, String alias,List<Role> roles)
    {
        StringBuilder sqlString = new StringBuilder();

        for (Role role : roles)
        {
            String dataScope = role.getDatascope();
            if (DATA_SCOPE_ALL.equals(dataScope))
            {
                sqlString = new StringBuilder();
                break;
            }
            else if (DATA_SCOPE_DEPT.equals(dataScope))
            {
                sqlString.append(StringUtils.format(" OR {}.dept_id = {} ", alias, user.getDeptId()));
            }
        }

        if (StringUtils.isNotBlank(sqlString.toString()))
        {
            BaseEntity baseEntity = (BaseEntity) joinPoint.getArgs()[0];
            baseEntity.getParams().put(DATA_SCOPE, " AND (" + sqlString.substring(4) + ")");
        }
    }

    /**
     * 是否存在注解，如果存在就获取
     */
    private DataScope getAnnotationLog(JoinPoint joinPoint)
    {
        Signature signature = joinPoint.getSignature();
        MethodSignature methodSignature = (MethodSignature) signature;
        Method method = methodSignature.getMethod();

        if (method != null)
        {
            return method.getAnnotation(DataScope.class);
        }
        return null;
    }
}
